1. The Commission and the competition authorities of the Member States shall apply the Community competition rules in close cooperation.

2. The Commission shall transmit to the competition authorities of the Member States copies of the most important documents it has collected with a view to applying Articles 7, 8, 9, 10 and Article 29(1). At the request of the competition authority of a Member State, the Commission shall provide it with a copy of other existing documents necessary for the assessment of the case.

3. The competition authorities of the Member States shall, when acting under Article 81 or Article 82 of the Treaty, inform the Commission in writing before or without delay after commencing the first formal investigative measure. This information may also be made available to the competition authorities of the other Member States.